# 赋值运算符
# 把10赋值给a
a = 10
print(a)

# 赋值复合运算符
# a + 1得到结果为11,  再把11给a赋值
# a = a + 1
a += 1 # 和上面等价  a = a + 1, 重点
print(a)

a -= 1  # a = a-1
print(a)
